STX Tuning is dedicated to offering motorists a professional bespoke ECU tuning service – We use the industry state of the art equipment, continuous software development and the talent of our experienced file writing team to provide quality, resulting in increased performance and economy. We are based in Slough, Berkshire and provide a custom ECU mobile remapping service in all surrounding areas of Slough including Maidenhead, Windsor, London, Marlow, Bracknell, Staines, Reading, Heathrow, Hayes, Southall, High Wycombe and Uxbridge. ✅No Mechanical Modifications ✅Software warranty ✅2001 vehicles onwards ✅Mobile service available ✅Diesel: Power & Economy ✅Petrol: Torque & Power ✅Private, Fleet & Commercial We offer a range of technical services, these services can be divided into four main categories.